drivers/usb/host/ohci-platform.c

   1 /*
   2  * Generic platform ohci driver
   3  *
   4  * Copyright 2007 Michael Buesch <m@bues.ch>
   5  * Copyright 2011-2012 Hauke Mehrtens <hauke@hauke-m.de>
   6  *
   7  * Derived from the OCHI-SSB driver
   8  * Derived from the OHCI-PCI driver
   9  * Copyright 1999 Roman Weissgaerber
  10  * Copyright 2000-2002 David Brownell
  11  * Copyright 1999 Linus Torvalds
  12  * Copyright 1999 Gregory P. Smith
  13  *
  14  * Licensed under the GNU/GPL. See COPYING for details.
  15  */
  16 #include <linux/err.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/usb/ohci_pdriver.h>
  19
  20 static int ohci_platform_reset(struct usb_hcd *hcd)
  21 {
  22         struct platform_device *pdev = to_platform_device(hcd->self.controller);
  23         struct usb_ohci_pdata *pdata = pdev->dev.platform_data;
  24         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  25         int err;
  26
  27         if (pdata->big_endian_desc)
  28                 ohci->flags |= OHCI_QUIRK_BE_DESC;
  29         if (pdata->big_endian_mmio)
  30                 ohci->flags |= OHCI_QUIRK_BE_MMIO;
  31         if (pdata->no_big_frame_no)
  32                 ohci->flags |= OHCI_QUIRK_FRAME_NO;
  33
  34         ohci_hcd_init(ohci);
  35
  36         if (pdata->num_ports)
  37                 ohci->num_ports = pdata->num_ports;
  38
  39         err = ohci_init(ohci);
  40
  41         return err;
  42 }
  43
  44 static int ohci_platform_start(struct usb_hcd *hcd)
  45 {
  46         struct ohci_hcd *ohci = hcd_to_ohci(hcd);
  47         int err;
  48
  49         err = ohci_run(ohci);
  50         if (err < 0) {
  51                 ohci_err(ohci, "can't start\n");
  52                 ohci_stop(hcd);
  53         }
  54
  55         return err;
  56 }
  57
  58 static const struct hc_driver ohci_platform_hc_driver = {
  59         .description            = hcd_name,
  60         .product_desc           = "Generic Platform OHCI Controller",
  61         .hcd_priv_size          = sizeof(struct ohci_hcd),
  62
  63         .irq                    = ohci_irq,
  64         .flags                  = HCD_MEMORY | HCD_USB11,
  65
  66         .reset                  = ohci_platform_reset,
  67         .start                  = ohci_platform_start,
  68         .stop                   = ohci_stop,
  69         .shutdown               = ohci_shutdown,
  70
  71         .urb_enqueue            = ohci_urb_enqueue,
  72         .urb_dequeue            = ohci_urb_dequeue,
  73         .endpoint_disable       = ohci_endpoint_disable,
  74
  75         .get_frame_number       = ohci_get_frame,
  76
  77         .hub_status_data        = ohci_hub_status_data,
  78         .hub_control            = ohci_hub_control,
  79 #ifdef  CONFIG_PM
  80         .bus_suspend            = ohci_bus_suspend,
  81         .bus_resume             = ohci_bus_resume,
  82 #endif
  83
  84         .start_port_reset       = ohci_start_port_reset,
  85 };
  86
  87 static int ohci_platform_probe(struct platform_device *dev)
  88 {
  89         struct usb_hcd *hcd;
  90         struct resource *res_mem;
  91         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
  92         int irq;
  93         int err = -ENOMEM;
  94
  95         if (!pdata) {
  96                 WARN_ON(1);
  97                 return -ENODEV;
  98         }
  99
 100         if (usb_disabled())
 101                 return -ENODEV;
 102
 103         irq = platform_get_irq(dev, 0);
 104         if (irq < 0) {
 105                 dev_err(&dev->dev, "no irq provided");
 106                 return irq;
 107         }
 108
 109         res_mem = platform_get_resource(dev, IORESOURCE_MEM, 0);
 110         if (!res_mem) {
 111                 dev_err(&dev->dev, "no memory resource provided");
 112                 return -ENXIO;
 113         }
 114
 115         if (pdata->power_on) {
 116                 err = pdata->power_on(dev);
 117                 if (err < 0)
 118                         return err;
 119         }
 120
 121         hcd = usb_create_hcd(&ohci_platform_hc_driver, &dev->dev,
 122                         dev_name(&dev->dev));
 123         if (!hcd) {
 124                 err = -ENOMEM;
 125                 goto err_power;
 126         }
 127
 128         hcd->rsrc_start = res_mem->start;
 129         hcd->rsrc_len = resource_size(res_mem);
 130
 131         hcd->regs = devm_ioremap_resource(&dev->dev, res_mem);
 132         if (IS_ERR(hcd->regs)) {
 133                 err = PTR_ERR(hcd->regs);
 134                 goto err_put_hcd;
 135         }
 136         err = usb_add_hcd(hcd, irq, IRQF_SHARED);
 137         if (err)
 138                 goto err_put_hcd;
 139
 140         platform_set_drvdata(dev, hcd);
 141
 142         return err;
 143
 144 err_put_hcd:
 145         usb_put_hcd(hcd);
 146 err_power:
 147         if (pdata->power_off)
 148                 pdata->power_off(dev);
 149
 150         return err;
 151 }
 152
 153 static int ohci_platform_remove(struct platform_device *dev)
 154 {
 155         struct usb_hcd *hcd = platform_get_drvdata(dev);
 156         struct usb_ohci_pdata *pdata = dev->dev.platform_data;
 157
 158         usb_remove_hcd(hcd);
 159         usb_put_hcd(hcd);
 160         platform_set_drvdata(dev, NULL);
 161
 162         if (pdata->power_off)
 163                 pdata->power_off(dev);
 164
 165         return 0;
 166 }
 167
 168 #ifdef CONFIG_PM
 169
 170 static int ohci_platform_suspend(struct device *dev)
 171 {
 172         struct usb_ohci_pdata *pdata = dev->platform_data;
 173         struct platform_device *pdev =
 174                 container_of(dev, struct platform_device, dev);
 175
 176         if (pdata->power_suspend)
 177                 pdata->power_suspend(pdev);
 178
 179         return 0;
 180 }
 181
 182 static int ohci_platform_resume(struct device *dev)
 183 {
 184         struct usb_hcd *hcd = dev_get_drvdata(dev);
 185         struct usb_ohci_pdata *pdata = dev->platform_data;
 186         struct platform_device *pdev =
 187                 container_of(dev, struct platform_device, dev);
 188
 189         if (pdata->power_on) {
 190                 int err = pdata->power_on(pdev);
 191                 if (err < 0)
 192                         return err;
 193         }
 194
 195         ohci_resume(hcd, false);
 196         return 0;
 197 }
 198
 199 #else /* !CONFIG_PM */
 200 #define ohci_platform_suspend   NULL
 201 #define ohci_platform_resume    NULL
 202 #endif /* CONFIG_PM */
 203
 204 static const struct platform_device_id ohci_platform_table[] = {
 205         { "ohci-platform", 0 },
 206         { }
 207 };
 208 MODULE_DEVICE_TABLE(platform, ohci_platform_table);
 209
 210 static const struct dev_pm_ops ohci_platform_pm_ops = {
 211         .suspend        = ohci_platform_suspend,
 212         .resume         = ohci_platform_resume,
 213 };
 214
 215 static struct platform_driver ohci_platform_driver = {
 216         .id_table       = ohci_platform_table,
 217         .probe          = ohci_platform_probe,
 218         .remove         = ohci_platform_remove,
 219         .shutdown       = usb_hcd_platform_shutdown,
 220         .driver         = {
 221                 .owner  = THIS_MODULE,
 222                 .name   = "ohci-platform",
 223                 .pm     = &ohci_platform_pm_ops,
 224         }
 225 };